Week 1 Flashcards
what is the goal of cerebrovascular procedures?
to prevent stroke and evaluate vasospasm of the brain after subarachnoid hemorrhage
Atherosclerosis is _______________
the primary disease of the carotid arteries and a primary cause of stroke
What is a stroke?
A stoke occurs when the blood supply to part of your brain is interrupted or severely reduced, depriving brain tissue of oxygen and nutrients; within minutes, brain cells begin to die
Stroke symptoms include:
Trouble speaking and understanding Paralysis or numbness of the face, arm or leg Trouble seeing in one or both eyes Headache Trouble walking
What does the acronym FAST stand for?
Face (smile, droop?)
Arms (raise arms, downward drift?)
Speech (slurred or strange speech?)
Time (call 911 right away)
Ischemia =
Blocked artery
- thrombus formed at carotid site - embolus breaking from carotid plaque - embolus from heart
Hemorrhage =
bleed in the brain caused by an artery bursting
85% of strokes are __________
ischemic
Ischemic strokes can be either _________ or ___________.
Thrombotic or Embolic
What is a common condition that causes an embolic stroke from the heart?
AFIB
When a blood vessel in the brain bursts and spills into the surrounding brain tissue, it is called a ____________
Intracerebral hemorrhage
When an artery near the surface of your brain bursts and spills into the space between the surface of your brain and your skull, it is called a ______________
subarachnoid hemorrhage
What is the biggest risk factor for stroke?
HTN
3/4 of all stokes occur is people who are ___________
over the age of 65
Define a TIA
Transient Ischemic Attack
- brief period of stoke symptoms (<24 hrs) - blockage is temporary
What is the best medical treatment for stroke?
TPA (Tissue plasminogen activator)
What is the term for a common Aortic arch branch variant?
Bovine
What is the first branch of the ECA?
The Superior Thyroid
What is the Flow divider?
The point of tissue where the ICA and ECA split
Define where the different sections of the ICA are located
Proximal - 0-1.5 cm from FD
Mid - 1.5 - 3.0 cm from FD
Distal - >3.0 cm from FD
What are some important collaterals if the ICA becomes occluded?
Supraorbital, Frontal, Nasal
Name the branches of the ECA starting proximally.
Superior Thyroid Lingual Facial Occipital Maxillary Superficial temporal
What is a common collateral if the CCA becomes occluded?
Retrograde ECA flow feeds the ICA
What is a common collateral if the ICA is occluded?
- ECA branches feed distal ophthalmic branches which feeds the ICA
- Flow through circle of willis
- vertebral to basilar to circle of willis
What is a common collateral if the proximal SCA is occluded?
- Ipsilateral Vertebral flow reverses to feed arm (subclavian steal)
- Contralateral vertebral into basilar and ipsilateral vertebral to arm
What is a common collateral if the BCA is occluded?
Vertebral flow reversal into proximal SCA to feed CCA
What plane is the best to visualize the ICA?
postero-lateral
How do you distinguish the Carotid Bulb from the proximal ICA?
Artery walls are not parallel in bulb
The Vertebral artery is ______ to the vein
deep